The Go-To Gem Combos

I've searched for information about this, but most of it is outdated since so many things get changed, nerfed, removed, etc. So as a helpful reference--unless someone knows of an existing source for it--I'd like to create a list of the most build-enabling, potent, and/or useful gem combinations as of 3.0.

Just as an example:
Cast When Damage Taken :: Immortal Call :: Increased Duration

This one is really well known, but it's still relevant and useful.

One I discovered recently was...
Shield Charge :: Fortify :: Curse on Hit :: Enfeeble, Punishment, Vulnerability, Elemental Weakness, etc

For my Lacerate build, I run Punishment for the extra damage scaling, because it's quite potent, but Enfeeble would have great synergy with Fortify as a strong defensive setup you can put on a 4L (glove, helm, boots).

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So the way I would like this to work is to have people put the strongest combinations they know into a list, and once it gets big enough, I'll collate them into organized categories and post a new thread with the updated info as a resource for people to reference.

Thanks in advance for any contributions.

Shield Charge/Etc > Faster Attacks > Fortify

Lightning Warp > Less Duration > Swift Affliction

Orb of Storms > Curse on Hit > Curse > Curse

Orb of Storms > Power Charge on Crit > Increased Crit Strikes > Inc Dura/Inc AoE

Decoy Totem > Minion and Totem Ele Res > Enhance > Empower

Didn't even think of Swift Affliction for Lit Warp. That's clever.

Cast When Damage Taken/Glacial Cascade/Curse on Hit/Enfeeble

Lightning Warp/Faster Casting/Less Duration/Culling Strike

vengeance/reckoning + onslaught

herald of ice + curse on hit + <curse> + onslaught

cast on death + portal

cast when damage taken + <golem>

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kompaniet wrote:

vengeance/reckoning + onslaught

herald of ice + curse on hit + <curse> + onslaught

cast on death + portal

cast when damage taken + <golem>

I've tried the counterattack gems with Onslaught, but they aren't reliable. However...

<Attack/Spell> + Culling Strike + Onslaught is pretty decent.

As for Heralds, I don't generally like to put too much on them, because they lose their effective value in most cases relative to their mana cost (reserved). But...

Herald of Ash + Ele Prolif has been pretty good from my testing.

leapslam + fortify + faster attacks + onslaught could work if you can do enough damage to one shot most white monsters in most maps. just to keep onslaught up for clear speed and pace.

abyssal cry + poison used to work in the past so linking onslaught to that should also work.

Didn't know that... Ugh. Nerfs ruin so much in this game.

Wither, faster casting, increased duration, spell totem.

Frost wall, curse on hit, temporal chains, offensive curse of choice. So nice for ranged because they're slowed and then they walk around a huge obstacle to get you.